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| H A D | mvpp2.c | c8feeb2b93a2b320d2a533e0443f95c61e157293 Mon Feb 20 10:29:16 UTC 2017 Thomas Petazzoni <thomas.petazzoni@free-electrons.com> net: mvpp2: adjust the allocation/free of BM pools for PPv2.2
This commit adjusts the allocation and freeing of BM pools to support
PPv2.2. This involves:
- Checking that the number of buffer pointers is a multiple of 16, as
required by the hardware.
- Adjusting the size of the DMA coherent area allocated for buffer
pointers. Indeed, PPv2.2 needs space for 2 pointers of 64-bits per
buffer, as opposed to 2 pointers of 32-bits per buffer in
PPv2.1. The size in bytes is now stored in a new field of the
mvpp2_bm_pool structure.
- On PPv2.2, getting the physical and virtual address of each buffer
requires reading the MVPP2_BM_ADDR_HIGH_ALLOC to get the high order
bits of those addresses. A new utility function
mvpp2_bm_bufs_get_addrs() is introduced to handle this.
- On PPv2.2, releasing a buffer requires writing the high order 32 bits
of the physical address to MVPP2_BM_PHY_VIRT_HIGH_RLS_REG. We no
longer need to write the virtual address to MVPP2_BM_VIRT_RLS_REG.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
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